elec_jfreechart.java

JSP移动商品管理平台源代码.........

package imis_elec;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.servlet.ServletUtilities;

public class Elec_JFreeChart extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Elec_JFreeChart() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		String displayType = request.getParameter("displayType");
		String userId = request.getParameter("userId");
		String startDate = request.getParameter("startDate");
		String endDate = request.getParameter("endDate");
		String type = request.getParameter("type");
		String title = "";
		String y = "";		// y轴标题
		String url = "../imis_elec/elec_JFree.jsp";
		
		String organidof = request.getParameter("OrganOf");
		
		//System.out.println(organidof);
		

		if(type.equals("1")) {
			title = "电量构成";
			y = "电量";
		} else {
			title = "价格构成";
			y = "价格";
		}
		
		String filename = "";
		//HashMap table = UsedByJFree.getTongjiTu(userId, startDate, endDate, type);
		HashMap table = UsedByJFree.getTongjiTu(userId, startDate, endDate, type , organidof);
		
		
		ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
		try {
			if(displayType.equals("pie")) { 		//面积比例饼图	//500是图片长度，300是图片高度
				filename = ServletUtilities.saveChartAsPNG(UsedByJFree.getchart(table,1,title,y, null, null, null), 500, 300, info, request.getSession());
			} else if(displayType.equals("bar")) {		//柱状图
				filename = ServletUtilities.saveChartAsPNG(UsedByJFree.getchart(table,2,title,y, null, null, null), 500, 300, null, request.getSession());
			} else if(displayType.equals("line")) {
				filename = ServletUtilities.saveChartAsPNG(UsedByJFree.getchart(table,3,title,y, null, null, null), 500, 300, null, request.getSession());
			}
			else if(displayType.equals("duibi")) {
				startDate = startDate.split("-")[0] + "-1";
				endDate = String.valueOf(Integer.parseInt(endDate.split("-")[0]) + 1) + "-1";
				//HashMap lastYear = UsedByJFree.getTongjiTuLastYear(userId, startDate, endDate, type);
				HashMap lastYear = UsedByJFree.getTongjiTuLastYear(userId, startDate, endDate, type , organidof);
				
				filename = ServletUtilities.saveChartAsPNG(UsedByJFree.getchart(table,2,title,y, lastYear, startDate, endDate), 800, 400, null, request.getSession());
				url = "../imis_elec/elec_JFreeDisplay.jsp";
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename; 
		
		request.setAttribute("graphURL", graphURL);
		request.getRequestDispatcher(url).forward(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}